摘要
李长文，余春昊，张银海等．岩石声波主频漂移现象及其应用探讨．测井技术，１９９９，２３（４）：２５３～２５７岩石超声测量分析结果表明，不同岩石具有不同的纵波或横波频率特性，岩石声衰减越大，其频率主值越低。纵波主频随孔隙流体性质变化较显著，与含气饱和度之间呈“Ｕ”字形关系。井孔模型中的声波全波列观测实验也指出，随着地层孔隙度及渗透率的增大，不仅各组分波的衰减增大、速度减小，而且其主频也有不同程度的降低，特别是斯通利波的主频明显向低频方向漂移，高频组分波比低频组分波衰减更大。上述实验现象得到了实际声波测井资料的印证。声波全波列频谱特征参数可用于非均质复杂储层评价和声波测井仪器改进。
The experimental results of
rock ultrasonic measurement show that the center frequency of acoustic waves may
vary with the properties of rocks. The larger the acoustic amplitude attenuation is, the
lower is the acoustic center frequency. A relationship of U shape is shown between the
center frequency of Pwave and gas (or water) saturation of sandstone. Investigation on
the acoustic full wavetrain in a scaled model borehole also show that, with the increase
of porosity and permeability of the formation, the wave attenuation becomes larger, the
velocities become slower, and the center frequencies become lower. Especially the
center frequency of the Stoneley waves obviously shifts low. These results can be used
to evaluate the complex reservoirs and to improve the acoustic logging tool.
出处
《测井技术》
CAS
CSCD
北大核心
1999年第4期253-257,共5页
Well Logging Technology
关键词
测井记录
声波测井
测井仪
主频漂移
岩石
spectrum analysiscenter frequencyacoustic fullwavetrain logultrasonic wavesimulation
welllaboratory testing
